Reply
 
Thread Tools Search this Thread Display Modes
 
Old 02-13-2018, 08:14 PM   #1
Veteran Member
 
City: Mooloolaba
Country: Australia
Vessel Name: Ohana
Vessel Model: DeFever 72
Join Date: Jul 2011
Posts: 82
Bimini Frame Strengthening

HI Everyone

Am looking for advice/opinions on how you would reduce flex in the bimini frame on my boat.

I have for three years now had 1000 watts of solar panels mounted on the bimini frame. Has been great and worked well, not moving at all despite strong winds etc. I am adding another 400 watts. Total weight is now going to be about 100kg.

The frame is about 4.2m wide and 3.6m in length so is quite a large size.

The frame is 1.6mm wall, 31mm diameter stainless steel.

The two middle arches flex too much and I am looking for options to stop flex.

On option is simply replace the two middle arches with 38mm diameter framing. This would apparently handle the weight no trouble.

The other option is to easily add front supports to the deck then run two longitudinal (bow to aft radar arch) supports. This gives the frame some cross section and distribute the weight better.

Any other ideas?

Appreciate any ideas which will help. Thanks,
__________________
Advertisement

Bohans is offline   Reply With Quote
Old 02-14-2018, 10:31 AM   #2
Guru
 
Xsbank's Avatar
 
City: Pender Harbour, BC
Country: Canada
Vessel Name: Gwaii Haanas
Vessel Model: Vancouver Shipyards Custom Aluminum 52
Join Date: Sep 2013
Posts: 3,196
Pictures would help...
__________________

__________________
Don't believe everything that you think.
What are we offended about today?
Xsbank is offline   Reply With Quote
Old 02-14-2018, 10:46 AM   #3
Guru
 
djmarchand's Avatar
 
City: Litchfield, Ct/Punta Gorda, Fl
Country: USA
Vessel Model: Atlas Pompano 23
Join Date: Aug 2012
Posts: 4,648
I think you need to do both options to take 100 kg of weight on top. Increase the main member size, put in a new forward support and add some fore/aft members.

It isn't the dead weight you have to worry about, it is the side to side loads as the boat rolls combined with wind from the side. Some gusset type members would help with that.

David
djmarchand is offline   Reply With Quote
Old 02-15-2018, 10:37 AM   #4
Veteran Member
 
City: Mooloolaba
Country: Australia
Vessel Name: Ohana
Vessel Model: DeFever 72
Join Date: Jul 2011
Posts: 82
Thanks David. I agree and this is likely the direction I will take. Thanks
Bohans is offline   Reply With Quote
Old 02-15-2018, 03:15 PM   #5
TF Site Team
 
Insequent's Avatar
 
City: Brisbane
Country: Australia
Vessel Name: Insequent
Vessel Model: Ocean Alexander 50 Mk I
Join Date: Mar 2012
Posts: 2,266
Hmm, it could easily end up quite cluttered.

Have you thought of making a custom hardtop from scratch, with just the panels as the rooftop? With some curvature and truss-style bracing, and a few 50mm support posts at different angles you could get a lot of solar capacity that is quite solid. Some canvas laced underneath to the trusses would neaten it up.

Why keep the bimini at all if all the members are to be replaced by larger sizes?
__________________
Brian
Insequent is online now   Reply With Quote
Old 02-15-2018, 05:59 PM   #6
Guru
 
Comodave's Avatar
 
City: Au Gres, MI
Country: US
Vessel Name: Never Say Never
Vessel Model: President 41 DC
Join Date: Jul 2015
Posts: 4,577
The problem with an all solar panel hardtop is that they usually look too square on a boat. I have seen several that just don’t look right because they are so square. Not much on most boats are really square especially up on top. There is a 47 Bayliner for sale now on Yachtworld that they replaced the bimini with all solar panels. I wouldn’t buy the boat due to that. I am sure that it works great and supplies a lot of power, it just looks wrong.
__________________

Comodave is online now   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





All times are GMT -5. The time now is 10:26 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012